Improvement in hot-air furnaces



'air furnace, halfin front elevation,

ttawa gluten r WWW b IMPROVEMENT IN HOT-AIR FURNACES.

The Schedule referred. to in these Letters Patent and making part of thesame.

To all whom it may concern Beit known that I, Tnnononn E. Conn in thecounty of Miami, and in the Stateof invented new and useful Improvementsin Heating- Furnaces; and I do hereby that the following is a fill],clear, and exact description thereof, reference being had to theaccompanying drawings, which make part of this specification, and inwhich v Figure'l represents a view of my improved warms, of Troy, Ohio,have at the line :eaz-of fig. 2, and

Figure 2, a vertical longitudinal section of at the line y'y of fig; 1.'i

. Theobject of my invention is to providea convenient furnace forheating buildings, apartments, 860., by means of warm air, which shallbe simple and economical in its construction, and present a large amountof heating-surface within a comparatively small space, as well asutilize, in 'an'increased degree, the calorific power of the fuel; towhich ends,

My improvements consist in a series of horizontal heating-pipes,arranged within a suitable chamber, and connected with a fire-chamber atthe lower part thereof, in such manner that after an ascending draughthas-been maintained, and the products of combustion reached the upperpipe of the series, theirdirection may be changed, and they caused topass downwards and through other pipes, for the purpose of fullyutilizing their calorific power before they are allowed to escape intothe chimney.

In the accompanying drawings, which show a convenient arrangement ofparts for carrying out the ob- ,iects of my invention, my fin-nace isrepresented as adapted to the use of wood fuel, but by substitutinga-vertical fire-chamber, provided with a suitable grate, for thehorizontal one shown, .mineral fuel can be burned with equal facility.

A'represents a chamber, of brick, in which the furthe same,

. nace is set, the air to be heated being admitted through an opening,a, in its bottom, and access to its interior afforded by a door, A, atone side.

B represents the 'fire-chamber, which is a cylinder of sheet-metal, ofsuitable thickness, elevated a short distance above the bottom of thechamber A, upon a bridge or support, a, so as to radiate the heat in alldirections, and provided with a door, B, for the introduction of thefuel, to which is attached a register, I), for regulating the supplyofair thereto.

The fire-chamber B communicates, through the'connections 11' near itsrear end, with the horizontal heatingepipes O G, which extendlongitudinally through the chamber A, passing through its front wall.

These pipes communicate, through the connections C, with similar pipes DD arranged above them, and these, in turn, by means of the connections(I, with a pipe, E, which is the most elevated of the series, and towhichthe chimney G is attached.

Below the pipe E is placed a similar pipe, F, which communicates with E,through the connections 0 and f.

and halfin section,

tached to the chamber A, for the purpose of conveying the heated air tothe rooms to be warmed;

. The operation of my furnace is as follows:

Fire being made in the chamber B, the escaping smoke and gases passthrough the connections 7) into the pipes G O, thence throughthe'connections 0, into the pipes D D, and thence through theconnections d,

into thepipe E, from which, when the damper E is open, they passdirectly-into the chimney G. After the fuel is thoroughly ignited, itbecomes desirable to obtain from it the best possible calorific eifect,and to this end the damper E is turned, by means of its rod, E, into theposition shown in fig. 2, when the products of combustiomhaving no otheroutlet, pass downwards through the connection 0, into the pipe E, thenceupward, through the connection), into the pipe E, on the opposite sideof thedamper, and escape into the chimney G.

The arrows in th currents. p

The heating-pipes are furnished with caps or covers 0' d. cf, byremoving which they can be readily cleaned, and as the connections standat a comparatively slight e figures show the direction of the I angle,there is no-tendency of dust or soot to accumulate within them.

An additional pipe may be connected to F if thought proper, for thepurpose of increasing heating-surface.

From the construction of my furnace it will be seen that it presentswithin a small compass a large amount of surface for the radiation ofheat, and the ability to establish a downward draught at pleasureincreases its calorific efl'ect and economizes fuel. v

j Having thus fully described my invention,

What I claim therein asnew, and desire to secure by Letters Patent, is-

1. The horizontal heating-pipes O O, D D, and E, in combination with theconnections I) c (l, and firechamherB, the whole arranged and operatingsubstantially as and for the puipose described.

2. The heating-pipe F and connections cf, in combination with the pipeE, damper E, connection d,

and chimney G, as set forth.

3. A warm-air furnace, in which'a downward draught is imparted to theproducts of combustion alter they have reached the uppermostheatingpipe, by means of the pipe F, connections 0 and f, pipe E, anddamper E, substantially as described.

The above specification signed by me, this 27th day of October, 1868. pF

THEODORE E. COLES. Witnesses:

DAVIS BAIRD, B. H. Pensons.

